Screw-driving machine.



J. J. W. KBNAN. SCREW DRIVING MACHINE. APPLICATION FILED APR. 9, 1900.

Patented Dec.28,190'9, HG Mums-sum 1.

.WITNESSESZ INVENTORI JOHN J. 144 KEN/71);

To all whom it may concern:

UNITED STATES PATENT OFFICE.

JOHN J. .w. 1112mm, or iHILADELPHIA, PENNSYLVANIA, ASSIGNOR or THREE- I FOURTHS T THOMAS W. JENKINS, OF PHILADELPHIA, PENNSYLVANIA, AND ONE- FOURTH TO RALPH BUFFETT, 0F COLIIVYN,

GRAY, OF MILLVILLE, NEW JERSEY.

SCREW-DRIVING MACHINE.

Be it known that I, JOHN J. W'. KENAN,

' of Philadelphia, in the county of Philadeh phia and State of Pennsylvania, have inon the line II,

' machine.

' with the friction vented certain new and v ments 1n Screw-Driving Machines, whereof the following is a specification, reference being had to the accompanying drawings.

My inventlon relates to a screw drlvnig machine for use 1n assembling the parts of electric devices, hardware, &c., and its object is to provide .for the rapid and economical insertion of screws in such parts.

To this end the invent'on comprises means for automatically feeding screws to the driving mechanism; means for guiding and supporting the screws to insure proper manipulation thereof; means for automatically cutting oif the power from the driving means when a screw has reached the proper predetermined depth; and various other features which will be more fully set forth in the specification and particularly pointed out in the claims.

In the accompanying drawings, Figure I, is a sectional elevation showing the complete machine. Fig. II, is a sectional view II, in Fig. I, showing in plan the direction of the race-way or chute. Fig. III, is a vertical section taken on the line III, III, in Fig. I, showing the details of the driver and screw holding jaws. Fig. IV, is a fragmentary side elevation showing the means of supporting the race-way and the guard of the chute. Fig. V, is a section on the line V, V, in Fig. I. Fig. VI, is a section along the line VI, VI, in Fig. I.

In said drawings,the frame 1, may be mounted upon a. suitable pedestal, or upon a bench or other support as desired. At the upper end of the frame 1, the driving shaft 2, is journaled in bearings 4, and 5. Upon this shaft are mounted the tight pulley 6, and the loose pulley 7, adapted to be driven by a belt which may be moved by the shipper 9, secured to the rod 10, slidablymount ed in lugs 12, cast upon the frame of the At the right hand end of the shaft 2, a beveled friction pinion 15, is secured by means of a threaded collar 17, en gaging the sleeve 1,8, which is fast to said shaft. The wheel 15, is beveled to co-act wheel 20, secured to the Specification of Letters Patent. Application filed April 9, 1908. Serial No, 425,978.

useful Improvetwo parallel brackets 44, 45, secured to the frame of the means of the screws Patented Dec. 28, 1909.

vertical shaft 22, journaled in bearings 24,

and 26; upon the frame of the machine. Between the wheel 20, and the bearing 24,

IS a. thrust bearing 28, which may be of any well known construction.

To the lower end of the vertical shaft 22,

is fastened a horizontal circular hopper 30, having a surrounding guard 32, secured in stationary position against a bracket 33, held in position by screws 34. For feeding the screws from theh-opper to the point where they are to be driven into the Work, a chute 40, is provided which is composed of strips 41, 42, mounted upon machine. These strips are .adjustably held by means of screws 48, passing through elongated slots 50, formed in said strips.

This construction allows the strips to be separated the required distance to accommodate the various sizes of screws intended to be used With the machine.

In order to prevent the screws from choking the race-way or overlapping each other,

the guard 52, is provided which is supported from brackets 53, 54, by means of screws 56,

passing through elongated slots in said guard. This constructionallows the guard to be moved vertically to accommodate screws with various sized heads as clearly seen in Fig. V. As a further ventin the race-way of the chute from spreading, the U-shaped block 58, is fastened to the upper side of thestrips 41, and 42, by 60, passing through elongated slotsin -said strips.- v The right hand end of the chute rests near. the bottom of the pan or. hopper 30, near its outer periphery, and is inclined upwardly a sufficient height to allow the largest sized screws to pass along the race-way through the slot 65, in the guard 32, and clear the top edge'of the rotating pan. .The chute is then means of .pre

bent downwardly and extends to a point adjaoent to the driver, as clearly seen in F ig. I. I To the left hand end of the driving shaft 2, is secured the frictional wheel 70, having between it and the bearing 4, a suitablethrust bearing 71. The drivm'g spindle of the machine is maintained inbearings 72, 73, and 74, formed upon the frame 1. .For driving said spindle the friction pinion 75, is mounted upon a sle'eve'78, journaled in bearing 72, said pinion being of the proper bevel I j of the lower end of the sleeve 78, is formed- Fig. .I, by means of adjust the depth to which the driver on the spindle 90. Surrounding the lower end of .thereon, and prevented from separating from i 5 ,to eo-act with the wheel 70. Upon the inside a conical depression 80, within which fits the corresponding conical projection 81. Said conical projection 81, is secured to the upper end of 'a sleeve 84, which is rotatably mounted in the bearing 74, on the frame 1. The driving spindle 90, is provided with a key-way 91, within which the key 92, may slide, said key-being secured to the inside of a threaded sleeve 94, which may be screwed into and out of the sleeve 84, and locked in position by. means of the lock nut locked in position by means of the lock nut 95.

In order to maintain the friction cones 80, and 81, in engagement, the coiled spring 96, is provided which surrounds the sleeve 84, and bears at its lower endagainst the upper face of the bearing 74, and at its upper end against a ball bearing 97, one member of said ball bearing being secured to said sleeve 84. The purpose of the threaded sleeve 94, is to spindle 90, will drive thescrew as will be hereinafter explained.

The lower end of the spindle 90, passes through the sleeve 100, slidably mounted in the bearing 73. Said sleeve is normally maintainedin its upper position as shown in a coiled spring 102, acting between a collar 103, upon the upper end of said sleeve and a plate 104, restmg upon the upper face of the bearing 73. For moving the spindle downwardly, to drive the screw, a handle 106, is provided, and pivoted at 107, to the frame 1. Said handle is enlarged at its central portion to surround the sleeve 108, said sleeve being connected to said enlarged portion by means of a screw or pin 109. i For maintaining the sleeve 108, in proper relation with the spindle 90, the upper member 110, of a ball bearing is made fast to said spindle by the screw 111, and the sleeve 112, surrounds the upper end of the sleeve 108, and is threaded upon the member 110. This allows the s indle 90, to be rotated without rotating the s eeve 108. For maintaining the handle 106, in its elevated position against the stop 113, the coiled spring 115, is provided which surrounds the spring 102, and bears at its'upper end against a collar 116, secured to the lower end of the sleeve 108, and at its lower end against the plate 104.

The driver 120, is tapered at its upper end to fit the corresponding tapered socket 121, formed in the lower end of the driving the driver is a sleeve 124, slidably mounted said driver by means of a pm 125 passing through the slot 126, in said sleeve. In order to maintain the proper relation of the sleeve 124, with relation to the end of the l driver, the coiled spring 141, surrounds the driver bearing agalnst the upper face of said sleeve and against the lower end of the spindle 90.

Projecting from the lower end of the sleeve 100, are two lugs 130, to the lower ends of which are pivotally attached the screw holding jaws 132. In order to maintain the lower ends of the jaws 132, in positlon to engage the shank of the screw a pair of dependlng arms 134, are provided which engage the upper ends of said jaws, said arms being formed integrally with the plate 104, which is maintained from rotating by means of a pin 135,'entering a hole in the upper face of the bearing 73.

.ln orderto prevent the jaws from openlng except at a predetermined time a washer or collar 13?, is sli'dably mounted upon the spindle 90, and rests in notches 138, formed upon the upper inner corners of said holding jaws 132. Said collar 137, is pressed downwardly by means of the coiled spring 140, bearing against the under side of the sleeve 100, and against. the upper side of said collar.

In order to remove the collar 137, from the notches 138, an adjustable hooked finger 142, is mounted in the bearing lug 73, as clearly shown-in Fig. I.

For opening the jaws under' predetermined conditions. the beveled sleeve 144, is threaded upon the lower end of the spindle 90, and engages-the bevels 145, upon the inside of said jaws. The lower ends of the jaws are separated upon their inner faces to form a continuation of the slot of the race-way but are closed upon their outer faces to form an abutment for the screw, the head of said screw resting upon the horizontal faces 148, as shown in Fig. III.

The operation of the device is as follows :The threaded sleeve 94, is adjusted to the proper height within the sleeve 84, so that when the screw has been driven the predetermined distance the head or enlarged upper end 98, ofthe spindle 90, will engage the upper end of the sleeve 94. lVhen the handle 106, is moved downwardly the spindle 90, together with the driver 120, and sleeve 124, move downwardly until said sleeve engages and centers the head of the screw, whereupon the driver enters the slot of the screw and the spring 141, above the sleeve124, is slightly compressed. At this point the beveled sleeve 144, engages the bevels 145, on the jaws 132, thus moving the jaws and the sleeve 100, downwardly until the collar 137, engages the hook on the fin-, ger 142. The said'collar 137 is thereby disengaged from the notch 138, whereupon the jaws are released. The downward movement of the jaws together with the sleeve 100, compresses the spring 102, so that as soon as-the jaws are released by the collar termined point in the l 137 engaging the hook on the at once lifts the slee the bevele sleeve 144 coiiperati bevels 145 onthe jaws, jaws and the. same, are their extreme upper pos ward movement of the tinue until the'head 98 gages the sleeve 94, whereu surfaces 80, and 81, will be by breaking the friction dri the rotation of the spindle.

By the construction set forth the shank of a screw may be supported while it is. being driven until a predetermined point is said sprin reached, whereupon,

thus removing the screw has been dri the driving means is auto ineffective so that a lar may all be driven int "predetermined distance.

Owing to the rapid rotation of. the ho 30, the screws are driven up the inch chute to its top whereupon they gravity to the point where the one by one u pn the jaws.

It will be u derstood that in place of the friction driving wheels and pinions, gears may be substituted, and various other features are merely to be considered as illustrative of an embodiment of my Having thus described my in 1. A screw driving machiiie, combination a a driver, means the driver'and for moving the tudinally, a screw, holder, ing said screw holder with s means for holding said scr ment of the driver.

2. A screw driving machine includin combination a driv said driver and for tudinally, screw holdin underlie the head an means for holding said j put under tension by the ment of the driver for o and means for releasing saidj determined point in the ion ment of the driver.

3. A screw driving machine including in combination a driver, means for rotating said driver, means. for moving the driver longitudinally, a sleeve, sleeve, holding said jaws and means for holding said carried by said driver carried by said er, means for rotating moving the same longig jaws arranged to guide the screw, aws closed, means downward moveg said jaws,

finger 142, 1' ve 100 and l ng with the separates the said l. quickly moved to itionr The downspindle 90, will con said spindle enpon, the conical separated thereve and stopping pper ned descend by are taken invention. vent-ion, I

including in for rotating same longimeans for movaid screw driver, ew holder closed, by the downward ver for liftin g the same, and holder at a ongitudinal move g the prede gitudinal movescrew holding jaws a spring normally said sleeve raised, jaws closed, means for-engaging and.

, longitudinall carried by said s holding said driver,

by said means ward and by said aws for separating said jaws when the same are released and moved Q upward. 7 A screw driving machine comprisinga procating screw/driver fof' 110 rotary and reci ging and driving the screw; a screw enga g in hold through a tance I openin in the placed between positively held means for engaging and releasing said holding means for thereupon opening said jaws.

9. A screw driving machine comprising a rotary and reciprocating screw driver for .1

moving said jaw for releasing the separated and raised by said spring.

combination, a 7 said driver, means for moving said driver-- a sleeve, screw holding aws the jaws are opened, 0. A screw dr support, and when the ven a sufiicient distance the s with the driver, and means jaws, whereby they may be iving machine including in driver,'means for rotating leeve, a spring for normally said sleeve raised, means for holding said aws closed when in raised position, meansfor locking said aws closed, meaiis for moving said sleeve and said jaws downward with the dr ver and means for releasing said' aws whereby they may be sepa-. rated and lifted by said spring.

iving machine including in combination a driver, means for rotating driver, means for moving the driver matically rendered longitudinally, a spring pressed sleeve carnumber of screws ried by said driver for centering the screw, 5 e work an equal g jaws, a sleeve carrying said aws, a spring for holding sleeve in raised position,

holding jaws, a sleeve to are pivoted, means tending means for moving said jaws downward with means for holding said jaws in closed position, means for releasing said jaws, and cot'iperating cam shoulders "carried for moving the jaws downer comprising two pivoted jaws for underlying the head of a screw. and guiding it ny desired predetermined disineans for positively holding the jaws from being opened; and means for g said jaws at a predetermined pointtravel'of said driver.

8 A screw driving machine comprising a prerotary and reciprocating; screw driver for engaging and driving the screw; a screwholder comprising two pivoted jaws for underlying the head of a screw and guiding it through a predetermined distance; means said jawswhereby they are 12 from opening; adjustable prising two en aging and driving the screw; a screw holder comprising two pivoted aws for underlying the head of a screw and guiding it through a predetermined distance; means placed between said jaws whereby they are prevented from opening;

adjustable means or engaging and releasing said holdin means; means for, ralsmg said aws, an

means for separating the same.

10. A screw driving machine comprising l means arranged to be engaged by said holding means; means for raising said jaws, and means connected with the driver for opening said jaws.

11. In a screw bination of a sleeve; a screw driving machine the comholder comsleeve; a collar for positively holding said jaws from being separated; means for moving said sleeve; and means for freeing said jaws from said collar.

12. Ina screw driving'machine the combination of a rotary and reciprocating driver for engaging and driving the screw; means for rotating said driver; and means automatically rendering. said rotating means inefl'ective when the driver has been moved longitudinally a predetermined distance.

13. In a screw driving machine the combination of a rotary and reciprocating driver for engaging and driving the screw; a pair of cooperating members for rotating said driver; and means for separating said members when the driver has been moved longitudinally a predetermined distance.

14. In a screw driving machine the combination of a rotary and reciprocating driver for engaging and driving the screw; of friction members for rotating said driver;

and guiding it.

pivoted jaws carried by said l jaws for a pair and means for separating said friction members when the driver has been moved-longitudinally a predetermined distance.

15. In a screw driving machine the combination of a rotary and reciprocating driver for engaging and driving the screw; a sleeve surrounding the spindle. of said driver; a lever connected to said sleeve; means for connecting said sleeve to said spindle to allow the latter to rotate yet move longitudinally with said sleeve; means for dIlV- ing said spindle; and means for automatically rendering said driving means ineffective when the driver has been moved longitudinally apredetermined distance.

1.6(In a screw driving machine the combination of a rotary and reciprocating spindle; a screw driver secured to said spindle; a sleevesurrounding said spindle; a pair of jaws pivotally mounted upon said sleeve; a collar surrounding said spindle and preventing said jaws from being opened; means for engaging. said collar when said spindle and have descended a predetermined distance whereby said jaws are free to be i opened; and means on said spindle for openll ing said jaws.

17. In a screw driving machine the combination of a rotary and reciprocating spindle; ascrew driver secured to said spindle; a sleeve surrounding said spindle; a pair of jaws pivotally mounted upon said sleeve; -means tending to keep said jaws pressed to gether; -means for positively holding said jaws from 'being opened; means arranged to remove said holding means when the spindle has been moved longitudinally a predetermined distance; and means for. opening said aws. I

In testimony whereof, I have hereunto signed my name, at Philadelphia, Pennsylvania, this third day of April 1908.

- JOHN J. W. KENAN. Witnesses:

JAMES H. BELL, E. L. FUILERTON. 

